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     <oRadioButto>:display() --> self

        display() is a method of the RadioButto class that is used for
        showing a radio button and its caption on the screen.  display() uses
        the values of the following instance variables to correctly show the
        radio button in its current context in addition to providing maximum
        flexibility in the manner a radio button appears on the screen:
        buffer, caption, capCol, capRow, col, colorSpec, hasFocus, row, and
        style.